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Natural water contains a small amont of tritium (31H). This isotope beta-decays with a half-life of 12.5 years. A mountaineer while climbing towards a difficult peak finds debris of some earlier unsuccessful attempt. Among other things he finds a sealed bottle of whisky. On return he analyses the whisky and finds that it contains only 1.5 per cent of the (31H). radioactivity as compared to a recently purchased bottle marked '8 years old'. Estimate the time of that unsuccessful attempt. |
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Answer» Natural water contains a small amont of tritium (31H). This isotope beta-decays with a half-life of 12.5 years. A mountaineer while climbing towards a difficult peak finds debris of some earlier unsuccessful attempt. Among other things he finds a sealed bottle of whisky. On return he analyses the whisky and finds that it contains only 1.5 per cent of the (31H). radioactivity as compared to a recently purchased bottle marked '8 years old'. Estimate the time of that unsuccessful attempt. |
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